An original and an effective method for the analysis of the dc-link voltage ripple for single-phase multilevel inverters based on H-bridge and level doubling network (LDN) is given in this paper. The LDN is basically a half-bridge fed by a floating capacitor, without the need of an additional dc supply and with voltage self-balancing capability, able to increase (double) the number of output voltage levels. This configuration is particularly suitable for single-phase single-stage grid-connected photovoltaic (PV) systems, and the LDN cell can be seen also as a retrofit for existing H-bridge configurations. In order to address the design of the conversion system, with particular reference to the dc-link capacitor, PV current and voltage ripples are analytically determined and verified by experimental tests.
Analysis of a flexible single-phase multilevel inverter topology for photovoltaic applications / Hammami, M.; Vujacic, M.; Viatkin, A.; Grandi, G.. - ELETTRONICO. - (2018), pp. 1-6. (Intervento presentato al convegno 9th International Renewable Energy Congress, IREC 2018 tenutosi a tunisia nel 20-22 march 2018) [10.1109/IREC.2018.8362533].
Analysis of a flexible single-phase multilevel inverter topology for photovoltaic applications
Hammami, M.;VUJACIC, MARIJA;VIATKIN, ALEKSANDR;Grandi, G.
2018
Abstract
An original and an effective method for the analysis of the dc-link voltage ripple for single-phase multilevel inverters based on H-bridge and level doubling network (LDN) is given in this paper. The LDN is basically a half-bridge fed by a floating capacitor, without the need of an additional dc supply and with voltage self-balancing capability, able to increase (double) the number of output voltage levels. This configuration is particularly suitable for single-phase single-stage grid-connected photovoltaic (PV) systems, and the LDN cell can be seen also as a retrofit for existing H-bridge configurations. In order to address the design of the conversion system, with particular reference to the dc-link capacitor, PV current and voltage ripples are analytically determined and verified by experimental tests.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
